Add leaderboard functionality with Redis integration for scores. This includes a global leaderboard system, server-side score submission handling, and real-time player ranking updates. Refactor and improve collision logic and game state management for better player experience.

pkg/game/data.go

@@ -91,3 +91,18 @@ type GameState struct {
 	ScrollX        float64                `json:"scroll_x"`
 	CollectedCoins map[string]bool        `json:"collected_coins"` // Welche Coins wurden eingesammelt (Key: ChunkID_ObjectIndex)
 }
+
+// Leaderboard-Eintrag
+type LeaderboardEntry struct {
+	PlayerName string `json:"player_name"`
+	PlayerCode string `json:"player_code"` // Eindeutiger Code für Verifikation
+	Score      int    `json:"score"`
+	Timestamp  int64  `json:"timestamp"` // Unix-Timestamp
+}
+
+// Score-Submission vom Client an Server
+type ScoreSubmission struct {
+	PlayerName string `json:"player_name"`
+	PlayerCode string `json:"player_code"`
+	Score      int    `json:"score"`
+}